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Finding the Fourth Proportional to 13,323.06, 19,978.07 and 7,777.80

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Solution

The fourth proportional to 13,323.06, 19,978.07 and 7,777.80 is: 11,662.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,323.06 : 19,978.07 = 7,777.80 : x
  2. Step 2: Convert to fraction form
    13,323.06/19,978.07 = 7,777.80/x
  3. Step 3: Cross multiply
    13,323.06x = 19,978.07 × 7,777.80
  4. Step 4: Simplify right side
    13,323.06x = 155,385,393.96
  5. Step 5: Solve for x
    x = 155,385,393.96/13,323.06
  6. Step 6: Final answer
    x = 11,662.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.